Patients are randomized to receive (+)-calanolide A or placebo for 21 days. All patients may elect to receive an open-label, 3-month course of approved retroviral therapy (up to triple-drug therapy) to be selected by, and administered under the care of, the patients' physicians. If the patient has no insurance coverage or does not wish to utilize his/her insurance for anti-HIV medications, Sarawak MediChem Pharmaceuticals will provide these medications at no charge for up to 3 months.